sqlmap/tamper/chardoubleencode.py
2024-01-03 23:11:52 +01:00

43 lines
1.2 KiB
Python

#!/usr/bin/env python
"""
Copyright (c) 2006-2024 sqlmap developers (https://sqlmap.org/)
See the file 'LICENSE' for copying permission
"""
import string
from lib.core.enums import PRIORITY
__priority__ = PRIORITY.LOW
def dependencies():
pass
def tamper(payload, **kwargs):
"""
Double URL-encodes all characters in a given payload (not processing already encoded) (e.g. SELECT -> %2553%2545%254C%2545%2543%2554)
Notes:
* Useful to bypass some weak web application firewalls that do not double URL-decode the request before processing it through their ruleset
>>> tamper('SELECT FIELD FROM%20TABLE')
'%2553%2545%254C%2545%2543%2554%2520%2546%2549%2545%254C%2544%2520%2546%2552%254F%254D%2520%2554%2541%2542%254C%2545'
"""
retVal = payload
if payload:
retVal = ""
i = 0
while i < len(payload):
if payload[i] == '%' and (i < len(payload) - 2) and payload[i + 1:i + 2] in string.hexdigits and payload[i + 2:i + 3] in string.hexdigits:
retVal += '%%25%s' % payload[i + 1:i + 3]
i += 3
else:
retVal += '%%25%.2X' % ord(payload[i])
i += 1
return retVal